| Abstrakt: |
The performance of the Long-Term Evolution-Advanced (LTE-A) User Equipment (UE) is severely degraded when it operates under high mobility conditions. In LTE-A, Orthogonal Frequency Division Multiple Access (OFDMA) receivers are used in the user equipment which operates in a frequently changing radio environment and produces high Doppler and delay spread. The orthogonality between the sub-carriers is affected due to the doubly selective channel because it makes sudden variations in the OFDM block, induces power leakage between sub-carriers and creates Inter-Carrier Interference (ICI) at the LTE-A receiver. To achieve higher downlink system performance and throughput at high mobility conditions, Ordering Parallel Successive Interference Cancellation (OPSIC) technique for LTE-A Heterogeneous Networks (HetNet) is proposed. The proposed scheme consists of several approximation steps. A parallel interference cancellation scheme is introduced in the existing Ordering Successive Interference Cancellation (OSIC) to remove the interference at every approximation stage which is to reduce the complexity of the successive interference cancellation and improve the data rate at UE. The experiment results show that the proposed OPSIC provides a better data rate at UE compared to traditional detection schemes. |
